PURPOSE: To shorten a construction period of a space truss by constituting a frame member by means of separating it into a bar and a sleeve member to fit onto it and easily carrying out connection work of them at a construction site.

CONSTITUTION: A frame member A is formed of sleeves 2b, 2b to screw and fit onto screw bars 3 by cutting the screw bars 3 on both ends of a frame member main body 1. Additionally, connectors 10 consisting of pins 7, bolts 8 and slots 9 are furnished on head ends of the sleeves 2b. Thereafter, the screwing amount with the screw bar 3 is adjusted by rotating the sleeve 2b of the frame member A in accordance with a space of joint members 13 to connect, and after inserting the frame member A between the joint members 13, the sleeve 2b is fixed at an assertive position of the screw bar 3 by tightening a bolt 11. Consequently, even when there is a small error in a distance of the joint members 13, it is possible to flexibly correspond to it by simple work, to simplify field work and to shorten a construction period.